voucher

n.

证件；凭证；收据；证人

复数：vouchers

voucher system付款凭单制度

gift voucher 礼券（等于gift token）

cash voucher优惠券；现金凭单

1. Some firms give their workers luncheon vouchers, which they can use to buy meals.
   有些公司发给职工午餐券,用以购买膳食。
2. She has a voucher for a free swim.
   她有一张免费游泳的凭证。

A meta-analysis of voucher-based reinforcement therapy for substance use disorders
Neighborhood Effects on Crime for Female and Male Youth: Evidence from a Randomized Housing Voucher Experiment
Sustained Cocaine Abstinence in Methadone Maintenance Patients Through Voucher-Based Reinforcement Therapy
Increasing opiate abstinence through voucher-based reinforcement therapy
Adding voucher-based incentives to coping skills and motivational enhancement improves outcomes during treatment for marijuana depen...
...of Chile's Nationwide School Voucher Program...
Voucher-based reinforcement of opiate plus cocaine abstinence in treatment-resistant methadone patients: effects of reinforcer magni...
Do accountability and voucher threats improve low-performing schools?
Smoked cocaine self-administration in females and voucher incentives for abstinence.
Voucher privatization ☆